M: Can you open the back of this phone?
Me: Um, no. I don’t really want you playing in there.
M: But I need to put in new batteries.
Me: But I don’t want you playing with batteries.
M: No, they’re just pretend batteries.
Me: Okay, then why don’t you pretend open it?
M: But then I can’t put in the batteries!
And yes, that did continue, just in that circular fashion, all the way home.